212100220212222 has 64 divisors (see below), whose sum is σ = 428986672208640. Its totient is φ = 69907496601600.

The previous prime is 212100220212163. The next prime is 212100220212233. The reversal of 212100220212222 is 222212022001212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 233045598 + ... + 233953950.

It is an arithmetic number, because the mean of its divisors is an integer number (6702916753260).

Almost surely, 2^{212100220212222} is an apocalyptic number.

212100220212222 is an abundant number, since it is smaller than the sum of its proper divisors (216886451996418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212100220212222 is a wasteful number, since it uses less digits than its factorization.

212100220212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909769.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 212100220212222 its reverse (222212022001212), we get a palindrome (434312242213434).

The spelling of 212100220212222 in words is "two hundred twelve trillion, one hundred billion, two hundred twenty million, two hundred twelve thousand, two hundred twenty-two".